/**
 * ***************************************************************************** Copyright (c) 2006,
 * 2008 IBM Corporation and others. All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0 which accompanies this
 * distribution, and is available at http://www.eclipse.org/legal/epl-v10.html
 *
 * <p>Contributors: IBM Corporation - initial API and implementation
 * *****************************************************************************
 */
package org.eclipse.ltk.internal.core.refactoring.history;

import org.eclipse.ltk.core.refactoring.ChangeDescriptor;
import org.eclipse.ltk.core.refactoring.CompositeChange;
import org.eclipse.ltk.core.refactoring.RefactoringChangeDescriptor;

/**
 * Wrapper change for refactorings which returns an unknown refactoring descriptor in case the
 * refactoring does not provide one.
 *
 * @since 3.2
 */
public final class RefactoringDescriptorChange extends CompositeChange {

  /**
   * Creates a new refactoring descriptor change.
   *
   * @param name the name of the change
   */
  public RefactoringDescriptorChange(final String name) {
    super(name);
  }

  /** {@inheritDoc} */
  public final ChangeDescriptor getDescriptor() {
    final ChangeDescriptor descriptor = super.getDescriptor();
    if (descriptor == null) {
      return new RefactoringChangeDescriptor(
          new UnknownRefactoringDescriptor(getChildren()[0].getName()));
    }
    return descriptor;
  }
}
